[haiku-commits] Re: r33543 - in haiku/trunk: headers/private/shared src/system/libroot/os
- From: Ingo Weinhold <ingo_weinhold@xxxxxx>
- To: haiku-commits@xxxxxxxxxxxxx
- Date: Wed, 14 Oct 2009 11:07:18 +0800
On 2009-10-13 at 15:04:36 [+0800], Axel Dörfler <axeld@xxxxxxxxxxxxxxxx>
wrote:
> "Michael Lotz" <mmlr@xxxxxxxx> wrote:
> > > Maybe they can one day be made more light-weight and faster in
> > > userland, too.
> > The rw_lock uses the thread blocking API through the corresponding
> > syscall though, so it shouldn't be too bad.
>
> Good!
Indeed. Just if you consider working some more on those, I had that idea
about introducing a similar mechanism currently used for preventing signal
delivery for preventing a thread from being preempted for a very short
time. That would allow for cheap userland spinlocks, which could also be
used to improve the userland locking primitives (I was originally thinking
of the pthread ones).
> > > All in all, I think I would prefer a nice C++ API for userland for
> > > these things, as that is our primary API.
> > We can certainly come up with a satisfying solution at BG :-)
>
> That, and so many other things :-)
Sounds like a very full schedule. :-)
CU, Ingo
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